Not an optical illusion, but I was out doing my first BTO Thrush Survey of the year today and thought I’d share a picture and ask people to tell me how many birds they see. Answer tomorrow. Feel free to ID them all too. Are they definitely all the same species?

It’s always a challenge as they tend to jump around between neighbouring trees, so keeping track can be tricky!

When you’ve made your count, just submit your answer via the comments.